Chris Hemsworth makes a cameo as a last minute crew member for Wild Oats XI

Forget winged keels, the crew of Wild Oats XI have an infinitely more powerful secret weapon up there sleeves - Thor!

Well, not quite, though Thor's alter ego Chris Hemsworth has gotten a taste for ocean racing by becoming a last minute crew member on the Sydney to Hobart winning-supermaxi at Hamilton Island over the weekend.

Hemsworth, and his wife Elsa Pataki, have been enjoying a rare weekend away without their three children and are staying at the luxurious Qualia resort owned by the billionaire Oatley family.

Children are not allowed inside the resorts high walls. The couple flew to Hamilton Island aboard a private jet on Saturday with Thor director, New Zealander Taika Waititi, after filming on location in Brisbane wrapped on Friday.

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Hemsworth then donned a red spray jacket and joined the crew of Wild Oats, including captain Mark Richards and owner Sandy Oatley, on the final day of Audi Race Week.

The Hollywood heavy hitters have been enjoying their downtime, dining at the Pebble Beach restaurant on Saturday night, making the most of their private infinity pool and keeping a low profile before flying back to the Gold Coast where filming of the fantasy blockbuster is scheduled to resume on Monday.

Chris Hemsworth and Tom Hiddleston were a knockout as they brought Thor's magical hammer to Lady Cilento Children's Hospital in Brisbane last week. Photo: Ben Bissett

The pair caused a stir last week when they visited Lady Cilento Children's Hospital in Brisbane dressed in character for the upcoming film.

Hiddleston's partner, singer Taylor Swift, last year had the island closed down and Sunrise reporter Michelle Tapper kicked off after hiring out the accommodation to treat the crew of her 1989 world tour and celebrate her birthday in private.